BMW 3 Owners & Service Manuals

BMW 3: Climate Control

As in previous BMW hybrid vehicles, an electrically powered air conditioning compressor is used in the G20 PHEV. Because the A/C compressor has an electric motor, it is possible to operate the air conditioning independently of the combustion engine. Thus the customer can enjoy the cooling effect of the air conditioning even while driving in pure electric mode and while stopped.

The high-voltage battery unit is cooled by the vehicle's refrigerant's circuit.

The stationary climate control is also available in the G20 PHEV.

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 System overview

G20 PHEV, components of refrigerant circuit Combined expansion and shutoff valve (interior) Combined expansion and shutoff valve (high-voltage battery unit) High-voltage battery unit Refrig

 Electric A/C compressor

Electric A/C compressor (EKK) Signal connector Low pressure line (gaseous refrigerant at low temperature and low pressure) High-voltage connector High pressure line (gaseous refrigerant at hig

 Stationary cooling

Owing to the fact that the air conditioning compressor in the G20 PHEV is electrically operated and that the high-voltage battery unit has high energy and power densities, a stationary climate

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 Warning with braking function

Display If a collision with a pedestrian or a cyclist is imminent, a warning symbol appears on the instrument cluster and in the Head-up Display. The red symbol is displayed and a signal sounds. Alternatively, depending on the vehicle equipment, a red warning triangle lights up in the instrument

 DC/DC converter

The DC/DC converter in the Electrical Machine Electronics of the G20 PHEV is able to adopt the following operating modes: Standby (also in the event of a component fault or short circuit, power electronics off) Buck mode (energy flow to the low-voltage side, converter adjusts voltage on

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